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AD5421BREZ-REEL Datenblatt(PDF) 5 Page - Analog Devices |
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AD5421BREZ-REEL Datenblatt(HTML) 5 Page - Analog Devices |
5 / 36 page Data Sheet AD5421 Rev. F | Page 5 of 36 Parameter1 Min Typ Max Unit Test Conditions/Comments Gain Error TC3 1 ppm FSR/°C Full-Scale Error −0.047 +0.047 % FSR −0.028 ±0.0017 +0.028 % FSR TA = 25°C Full-Scale Error TC3 1 ppm FSR/°C Downscale Alarm Current 3.08 3.21 mA Upscale Alarm Current 22.78 23 mA 4 mA to 20 mA and 3.8 mA to 21 mA ranges 23.99 24.01 mA 3.2 mA to 24 mA range OUTPUT CHARACTERISTICS3 Loop Compliance Voltage4 LOOP− + 5.5 V REGOUT < 5.5 V, loop current = 24 mA LOOP− + 12.5 V REGOUT = 12 V, loop current = 24 mA Loop Current Long-Term Stability 100 ppm FSR Drift after 1000 hours at TA = 125°C, loop current = 12 mA, internal RSET 15 ppm FSR Drift after 1000 hours at TA = 125°C, loop current = 12 mA, external RSET Loop Current Error vs. REGOUT Load Current 1.2 µA/mA Loop current = 12 mA, load current from REGOUT = 5 mA Resistive Load 0 2 kΩ See Figure 20 for a load line graph Inductive Load 50 mH Stable operation Power Supply Sensitivity 0.1 µA/V Loop current = 12 mA Output Impedance 12 400 MΩ Output TC 3 ppm FSR/°C Loop current = 12 mA, internal RSET 1 ppm FSR/°C Loop current = 12 mA, external RSET Output Noise 0.1 Hz to 10 Hz 50 nA p-p 500 Hz to 10 kHz 0.2 mV rms HART bandwidth; measured across 500 Ω load Noise Spectral Density 195 nA/√Hz At 1 kHz 256 nA/√Hz At 10 kHz REFERENCE INPUT (REFIN PIN)3 Reference Input Voltage5 2.5 V For specified performance DC Input Impedance 75 800 MΩ REFERENCE OUTPUTS REFOUT1 Pin Output Voltage 2.498 2.5 2.503 V TA = 25°C Temperature Coefficient 1.5 4 ppm/°C C grade 2 8 ppm/°C B grade 4 10 ppm/°C A grade Output Noise (0.1 Hz to 10 Hz)3 7.5 µV p-p Noise Spectral Density3 245 nV/√Hz At 1 kHz 70 nV/√Hz At 10 kHz Output Voltage Drift vs. Time3 200 ppm Drift after 1000 hours at TA = 125°C Capacitive Load3 10 nF Recommended operation Load Current3, 6 4 mA Short-Circuit Current3 6.5 mA Short circuit to COM Power Supply Sensitivity3 2 12 µV/V Thermal Hysteresis3 285 ppm First temperature cycle 5 ppm Second temperature cycle Load Regulation3 0.1 0.2 mV/mA Measured at 0 mA and 1 mA loads Output Impedance 0.1 Ω REFOUT2 Pin Output Voltage 1.18 1.227 1.28 V TA = 25°C Output Impedance 72 kΩ |
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